Numerical Method of Radiation Impedance Calculation in Enclosed Space

Abstract

A numerical method for calculating the radiation impedance of sound sources in enclosed space is established in this paper. The correctness of the proposed method is verified by analytical results. Primarily, the radiation impedance of a pulsating sphere sound source in the free field and the enclosed space is analyzed using analytical calculation method. Furthermore, the radiation impedance of a pulsating ball sound source is calculated by acoustic finite element software Actran using the proposed numerical method. The research shows that the method of calculating the sound source radiation impedance by Actran is suitable for the analysis of the acoustic impedance characteristics of underwater sound sources. The numerical method established in this paper provides a useful numerical method to analyze the radiation impedance characteristics of underwater sound sources with complex geometric structure.